Answer: No, he is not
Step-by-step explanation:
tNo, he is not because he killed Moctezuma and looted them for their suns of gold and moons of silver. Moctezuma thought he was a god but he lied to them just to steal their riches. Additionally, he killed their people and some of them even joined him because they didn't like how they were being treated.
In Conclusion, No he is not a reliable source because he lied about being a God, killing them and looting their entire village.